Petricola patagonica D'Orbingy, 1845 Petricolaria dactylus, common name petricola, is a species of saltwater clam, a marine bivalve mollusk in the family Veneridae, the Venus clams.

Petricolaria dactylus is a perforating species of substrates such as sandstone and stony bottoms.

This species is native to the eastern coast of South America from Uruguay to the Patagonian Atlantic coast.

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